US5545457A - Self-adhesive lidding film for packaging electronic components - Google Patents

Self-adhesive lidding film for packaging electronic components Download PDF

Info

Publication number
US5545457A
US5545457A US08/201,585 US20158594A US5545457A US 5545457 A US5545457 A US 5545457A US 20158594 A US20158594 A US 20158594A US 5545457 A US5545457 A US 5545457A
Authority
US
United States
Prior art keywords
lidding film
lidding
adhesive
film according
adhesive layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/201,585
Inventor
Christian Harder
Bernd Howe
Karl Kuhlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beiersdorf AG
Original Assignee
Beiersdorf AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beiersdorf AG filed Critical Beiersdorf AG
Assigned to BEIERSDORF AKTIENGESELLSCHAFT reassignment BEIERSDORF AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARDER, CHRISTIAN, HOWE, BERND, KUHLMANN, KARL
Application granted granted Critical
Publication of US5545457A publication Critical patent/US5545457A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/0084Containers and magazines for components, e.g. tube-like magazines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24752Laterally noncoextensive components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2809Web or sheet containing structurally defined element or component and having an adhesive outermost layer including irradiated or wave energy treated component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2843Web or sheet containing structurally defined element or component and having an adhesive outermost layer including a primer layer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848Three or more layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/28Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2852Adhesive compositions
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31786Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797Next to addition polymer from unsaturated monomers

Definitions

  • the invention relates to a self-adhesive lidding film for packaging electronic components and to the use of packages lidded in this way, in particular in high-speed automatic machines.
  • thermoformed caverns of thermoplastic sheeting such as, for example, in sheeting made from polyvinyl chloride (PVC), polystyrene (PS) or polycarbonate (PC), these plastics being processed either in pure form or filled with carbon black.
  • PVC polyvinyl chloride
  • PS polystyrene
  • PC polycarbonate
  • Lidding films of this type have been described in the prior art and are also commercially available, for example as “cover tape YR 2666" from 3M.
  • products of this type are described in Siemens Patent EP 51 168, and also in DE-A 39 28 712, DE-A 39 28 713 and EP-A 300 838.
  • peeling-off of the lidding film in a high-speed automatic machine of this type must not, for example, result in adhesive residues on the packaging belt, since such residues can build up and accumulate, although perhaps only in very small amounts at individual point, but in the overall process giving interfering amounts at individual machine parts and then interfere with the process. Any residue of adhesive compositions must therefore be avoided, in particular after exposure of the lidded package to moisture and heat, as required by many belt processors, for example in the IEC 68-2-3 tropics test.
  • the object of the invention was to provide a remedy here and to avoid the disadvantages of products of the prior art, but at least to reduce them to an extent acceptable for industry.
  • the invention relates to self-adhesive lidding film and to the use thereof as characterized in greater detail in the patent claims.
  • the pressure-sensitive adhesives employed here are copolymers based on various acrylate compounds, such as acrylic acid, butyl acrylate, methylhexyl acrylate and stearyl acrylate, since this group of adhesives generally has very good heat and ageing resistance.
  • acrylate compounds such as acrylic acid, butyl acrylate, methylhexyl acrylate and stearyl acrylate
  • this group of adhesives generally has very good heat and ageing resistance.
  • a particular mixture of acrylate adhesive compositions is employed according to the invention, namely firstly a highly polar component and secondly a rather nonpolar component. This results in simple, rapid and durable bonding to a very wide variety of belt tapes, as employed in practice.
  • the highly polar component contains from 1 to about 20%, in particular from 6 to 10%, especially about 8%, of acrylic acid in the monomer composition, and the other relatively, nonpolar component contains from 5 to 50%, in particular from 10 to 30%, especially about 20%, of stearyl acrylate in the monomer composition.
  • an adhesion promoter (primer) is present between the adhesive layer and the film support of the lidding film.
  • a particularly suitable adhesion promoter is one of the reactive acrylate copolymer type with an epoxy curing agent.
  • a particularly suitable support for the lidding film is a polyester film, in thicknesses of from 0.015 to 0.050 mm.
  • a polyester film of the Hostaphan RN type from Hoechst in a thickness of 0.025 mm is coated with an adhesion promoter based on an acrylate copolymer.
  • the acrylate copolymer employed is a 46% strength dispersion from ICI containing NeoTac A-570 and, as curing agent, the water-dispersible epoxy resin Epi-Rez WD-510 from Interez Inc.
  • the two substances react at room temperature to give a film which is insoluble in MEK, acetone and isopropanol and has a softening point of above 190° C.
  • the NeoTac A-570:Epi-Rez WD-510 mixing ratio is 88.5:11.5.
  • the application is carried out by means of a wire knife coater from a 10% strength dispersion, application rate 0.3 g/m 2 .
  • the self-adhesive composition coating is applied from 40% strength solution at a rate of 42 g/m 2 .
  • the self-adhesive composition applied comprises 80 parts of an acrylate copolymer containing 9% of acrylic acid and 20 parts of an acrylate copolymer containing 20% of stearyl acrylate.
  • the finished adhesive tape is exposed on the composition side to electron beam irradiation (210 kV irradiation voltage and a dose of 40 kGy) in order to achieve the desired property profile of the adhesive composition.

Abstract

Self-adhesive lidding film for packaging electronic components, whose adhesive layer is covered with a non-adhesive covering in the center, wherein the adhesive layer comprises a mixture of two acrylate adhesive compositions of different polarity, the first, highly polar component containing from 1 to 20%, in particular from 6 to 10%, especially about 8%, of acrylic acid in the monomer composition, and the other, nonpolar component containing from 5 to 50%, in particular from 10 to 30%, especially about 20%, of stearyl acrylate in the monomer composition, and where an adhesion promoter or primer is present between the adhesive layer and the film support of the lidding film.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a self-adhesive lidding film for packaging electronic components and to the use of packages lidded in this way, in particular in high-speed automatic machines.
2. Description of the Prior Art
Electronic components, in particular micro-electronic components, are packaged in thermoformed caverns of thermoplastic sheeting, such as, for example, in sheeting made from polyvinyl chloride (PVC), polystyrene (PS) or polycarbonate (PC), these plastics being processed either in pure form or filled with carbon black. These so-called belts have for many years been sealed with lidding films by means of hot-melt adhesives and processed in automatic machines, i.e. opened and the components packaged in them removed.
However, there are also already self-adhesive lidding films for such applications whose adhesive layer has been deactivated in the centre by means of a conductive or nonconductive plastic film. This deactivating strip covers the openings of the support belt so that the components do not come into contact with the self-adhesive layer. The adhesive strips with widths of 0.5 to 1.2 mm remaining at the two edges of the sealing sheet bond the latter to the support belt. A sufficient adhesive force here is regarded as being a peel-off force of the sealing sheet from the support belt in the range 20-100 cN.
Lidding films of this type have been described in the prior art and are also commercially available, for example as "cover tape YR 2666" from 3M. In addition, products of this type are described in Siemens Patent EP 51 168, and also in DE-A 39 28 712, DE-A 39 28 713 and EP-A 300 838.
However, the products of the prior art have disadvantages which are particularly noticeable in practice. For example, packages of this type containing electronic components are employed in high-speed automatic machines in which the slightest disturbances or unevenness has consequences for the entire process in which the use of a package lidded in this way has been integrated. Thus, for example, lidding films which adhere nonuniformly can result in problems as a consequence of differing polarities of the various materials employed, and the lidding film must therefore adhere equally well to various packaging belts, and must do so immediately and with sufficient strength. In addition, peeling-off of the lidding film in a high-speed automatic machine of this type must not, for example, result in adhesive residues on the packaging belt, since such residues can build up and accumulate, although perhaps only in very small amounts at individual point, but in the overall process giving interfering amounts at individual machine parts and then interfere with the process. Any residue of adhesive compositions must therefore be avoided, in particular after exposure of the lidded package to moisture and heat, as required by many belt processors, for example in the IEC 68-2-3 tropics test.
The object of the invention was to provide a remedy here and to avoid the disadvantages of products of the prior art, but at least to reduce them to an extent acceptable for industry.
SUMMARY OF THE INVENTION
Accordingly, the invention relates to self-adhesive lidding film and to the use thereof as characterized in greater detail in the patent claims.
In the manner known per se, the pressure-sensitive adhesives employed here are copolymers based on various acrylate compounds, such as acrylic acid, butyl acrylate, methylhexyl acrylate and stearyl acrylate, since this group of adhesives generally has very good heat and ageing resistance. However, in order to meet the particular requirements in the present case due to the variety of substrates to be bonded, a particular mixture of acrylate adhesive compositions is employed according to the invention, namely firstly a highly polar component and secondly a rather nonpolar component. This results in simple, rapid and durable bonding to a very wide variety of belt tapes, as employed in practice. Together with the adhesion promoter used, this results in fault-free use of the packages sealed according to the invention in high-speed automatic machines without interfering residues of adhesive composition hindering the process and without interfering unevenness in the peel-off behaviour resulting in vibrations building up.
Advantageously, the highly polar component contains from 1 to about 20%, in particular from 6 to 10%, especially about 8%, of acrylic acid in the monomer composition, and the other relatively, nonpolar component contains from 5 to 50%, in particular from 10 to 30%, especially about 20%, of stearyl acrylate in the monomer composition. Advantageously an adhesion promoter (primer) is present between the adhesive layer and the film support of the lidding film.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A particularly suitable adhesion promoter is one of the reactive acrylate copolymer type with an epoxy curing agent.
A particularly suitable support for the lidding film is a polyester film, in thicknesses of from 0.015 to 0.050 mm.
The invention is described below with reference to examples, although these do not represent a limitation. Percentages are % by weight, parts are parts by weight.
EXAMPLE
A polyester film of the Hostaphan RN type from Hoechst in a thickness of 0.025 mm is coated with an adhesion promoter based on an acrylate copolymer. The acrylate copolymer employed is a 46% strength dispersion from ICI containing NeoTac A-570 and, as curing agent, the water-dispersible epoxy resin Epi-Rez WD-510 from Interez Inc. The two substances react at room temperature to give a film which is insoluble in MEK, acetone and isopropanol and has a softening point of above 190° C. The NeoTac A-570:Epi-Rez WD-510 mixing ratio is 88.5:11.5.
The application is carried out by means of a wire knife coater from a 10% strength dispersion, application rate 0.3 g/m2.
The self-adhesive composition coating is applied from 40% strength solution at a rate of 42 g/m2. The self-adhesive composition applied comprises 80 parts of an acrylate copolymer containing 9% of acrylic acid and 20 parts of an acrylate copolymer containing 20% of stearyl acrylate.
The finished adhesive tape is exposed on the composition side to electron beam irradiation (210 kV irradiation voltage and a dose of 40 kGy) in order to achieve the desired property profile of the adhesive composition.

Claims (13)

We claim:
1. A self-adhesive lidding film for packaging electronic components, comprising
(a) a thermoplastic film
(b) an adhesion promoter on one side of the thermoplastic film,
(c) an adhesive layer on the adhesion promoter, and
(d) a nonadhesive covering spaced from the edges of said adhesive layer,
the adhesive layer (c) comprising a mixture of 80 parts by weight of a first acrylate polymer and about 20 parts by weight of a second acrylate polymer adhesive of different polarity from said first, said first acrylate polymer adhesive being polar and containing from about 1 to 20% by weight of acrylic acid monomer, the second acrylate polymer adhesive being substantially non-polar and containing from about 5 to 50% by weight of stearyl acrylate monomer.
2. A lidding film according to claim 1, wherein the covering (d) is a plastic film.
3. A lidding film according to claim 1, wherein the film (a) is a polyester.
4. A lidding film according to claim 1, wherein adhesion promoter (b) comprises an acrylic copolymer and an epoxy curing agent.
5. A lidding film according to claim 1, wherein the epoxy curing agent comprises bis-phenol A.
6. A lidding film according to claim 5, wherein the weight ratio between the acrylic copolymer and the epoxy curing agent is between about 95:5 and 80: 20.
7. A lidding film according to claim 5, wherein the weight ratio between the acrylic copolymer and the epoxy curing agent is about 88.5:11.5.
8. A lidding film according to claim 4, wherein adhesion promoter (b) comprises about 88.5 parts by weight of an acrylic copolymer and 11.5 parts by weight of the epoxy curing agent which is bis-phenol A, and wherein adhesive layer (c) has been exposed to electron irradiation, and covering (d) is a plastic film.
9. A lidding film according to claim 8, wherein the film (a) is a polyester, and in adhesive layer (c) said first acrylate polymer adhesive contains about 8% of acrylic acid and said second acrylate polymer adhesive contains about 20% of stearyl acrylate.
10. In the sealing of electronic components in lidding films on high-speed automatic machines, the improvement which comprises employing as said lidding film a lidding film according to claim 8.
11. A lidding film according to claim 1, wherein adhesive layer (c) has been exposed to electron irradiation.
12. In the sealing of electronic components in lidding films on high-speed automatic machines, the improvement which comprises employing as said lidding film a lidding film according to claim 1.
13. A lidding film according to claim 1, wherein in adhesive layer (c) said first acrylate polymer adhesive contains from about 6 to 10% of acrylic acid and said second acrylate polymer adhesive containing from about 10 to 30% of stearyl acrylate.
US08/201,585 1993-02-26 1994-02-25 Self-adhesive lidding film for packaging electronic components Expired - Fee Related US5545457A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4305910A DE4305910A1 (en) 1993-02-26 1993-02-26 Self-adhesive capping film for packaging electronic components
DE4305910.4 1993-02-26

Publications (1)

Publication Number Publication Date
US5545457A true US5545457A (en) 1996-08-13

Family

ID=6481366

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/201,585 Expired - Fee Related US5545457A (en) 1993-02-26 1994-02-25 Self-adhesive lidding film for packaging electronic components

Country Status (5)

Country Link
US (1) US5545457A (en)
EP (1) EP0613338B1 (en)
JP (1) JPH0776675A (en)
DE (2) DE4305910A1 (en)
ES (1) ES2095689T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5942581A (en) * 1995-12-13 1999-08-24 Mitsubishi Rayon Co., Ltd. Lubricant for a thermoplastic resin and a thermoplastic resin composition comprising thereof
US20040045733A1 (en) * 2001-05-10 2004-03-11 Joseph Cheynet Protective casing for a display screen and a method and tool for manufacturing such a casing
DE10357322A1 (en) * 2003-12-05 2005-06-30 Tesa Ag Two-layer pressure-sensitive adhesive

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29517641U1 (en) * 1995-11-07 1996-01-04 Siemens Ag Object with film-like protection, especially installation equipment
US6030692A (en) * 1996-09-13 2000-02-29 Netpco Incorporated Cover tape for formed tape packing system and process for making same

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725115A (en) * 1970-06-18 1973-04-03 Ppg Industries Inc Pressure-sensitive adhesive articles and method of making same
US4054232A (en) * 1976-05-05 1977-10-18 Eastman Kodak Company Fluid containers
JPS5679112A (en) * 1979-12-03 1981-06-29 Ricoh Co Ltd Preparation of nonaqueous resin dispersion
EP0051168A1 (en) * 1980-10-30 1982-05-12 Siemens Aktiengesellschaft Package for electrical components
US4413073A (en) * 1981-06-29 1983-11-01 Ici Australia Limited Stable aqueous film-forming dispersions
US4421822A (en) * 1979-08-20 1983-12-20 Minnesota Mining And Manufacturing Co. Ultraviolet polymerization of acrylate monomers using oxidizable tin compounds
US4513039A (en) * 1982-11-04 1985-04-23 Minnesota Mining And Manufacturing Company Composite of separable pressure-sensitive adhesive tapes
US4569960A (en) * 1983-09-06 1986-02-11 Minnesota Mining And Manufacturing Company Water-dispersible pressure-sensitive adhesive and tape made therewith
DE3530581A1 (en) * 1984-08-28 1986-03-13 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka CARRIER FOR ELECTRONIC CHIPS
EP0300838A1 (en) * 1987-07-24 1989-01-25 LINTEC Corporation Cover tape for sealing the chip-holding parts of a carrier tape
DE3928713A1 (en) * 1988-08-31 1990-03-01 Norddeutsche Seekabelwerke Ag Picking up belt, esp. for surface mounted devices - uses carrying belt closed by web having anti-static conducting strips separated by transparent areas showing components beneath
DE3928712A1 (en) * 1988-08-31 1990-03-01 Norddeutsche Seekabelwerke Ag Holder for electronic micro-components - prevents damage from charges or discharges by having structure made of thermoplastics with conductive layers incorporated
US4912169A (en) * 1987-10-14 1990-03-27 Rohm And Haas Company Adhesive compositions containing low molecular weight polymer additives
US4963405A (en) * 1988-08-12 1990-10-16 Minnesota Mining And Manufacturing Company Tape for encasing electronic parts
US5035933A (en) * 1989-03-01 1991-07-30 Rohm And Haas Company Plastic articles with compatibilized barrier resin
WO1991014461A1 (en) * 1990-03-28 1991-10-03 Smith & Nephew Plc Adhesive compositions
US5149586A (en) * 1987-07-08 1992-09-22 Furukawa Electric Co., Ltd. Radiation-curable adhesive tape
EP0511685A1 (en) * 1983-04-12 1992-11-04 Mita Industrial Co., Ltd. Electrostatic copying apparatus
US5164441A (en) * 1989-06-02 1992-11-17 Exxon Chemical Patents Inc. Internal resin-tackified acrylic polymers
US5252694A (en) * 1992-01-22 1993-10-12 Minnesota Mining And Manufacturing Company Energy-polymerization adhesive, coating, film and process for making the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8713163U1 (en) * 1987-09-30 1987-11-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
EP0372728A3 (en) * 1988-12-07 1991-11-21 Minnesota Mining And Manufacturing Company Smoothly removable cover tape for electronic component carrier

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725115A (en) * 1970-06-18 1973-04-03 Ppg Industries Inc Pressure-sensitive adhesive articles and method of making same
US4054232A (en) * 1976-05-05 1977-10-18 Eastman Kodak Company Fluid containers
US4421822A (en) * 1979-08-20 1983-12-20 Minnesota Mining And Manufacturing Co. Ultraviolet polymerization of acrylate monomers using oxidizable tin compounds
JPS5679112A (en) * 1979-12-03 1981-06-29 Ricoh Co Ltd Preparation of nonaqueous resin dispersion
EP0051168A1 (en) * 1980-10-30 1982-05-12 Siemens Aktiengesellschaft Package for electrical components
US4413073A (en) * 1981-06-29 1983-11-01 Ici Australia Limited Stable aqueous film-forming dispersions
US4513039A (en) * 1982-11-04 1985-04-23 Minnesota Mining And Manufacturing Company Composite of separable pressure-sensitive adhesive tapes
EP0511685A1 (en) * 1983-04-12 1992-11-04 Mita Industrial Co., Ltd. Electrostatic copying apparatus
US4569960A (en) * 1983-09-06 1986-02-11 Minnesota Mining And Manufacturing Company Water-dispersible pressure-sensitive adhesive and tape made therewith
DE3530581A1 (en) * 1984-08-28 1986-03-13 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka CARRIER FOR ELECTRONIC CHIPS
US5149586A (en) * 1987-07-08 1992-09-22 Furukawa Electric Co., Ltd. Radiation-curable adhesive tape
US4994300A (en) * 1987-07-24 1991-02-19 Lintec Corporation Method of making a cover tape for sealing chip-holding parts of carrier tape
US4929486A (en) * 1987-07-24 1990-05-29 Fsk Kabushiki Kaisha Cover tape for sealing chip-holding parts of carrier tape
EP0300838A1 (en) * 1987-07-24 1989-01-25 LINTEC Corporation Cover tape for sealing the chip-holding parts of a carrier tape
US4912169A (en) * 1987-10-14 1990-03-27 Rohm And Haas Company Adhesive compositions containing low molecular weight polymer additives
US4963405A (en) * 1988-08-12 1990-10-16 Minnesota Mining And Manufacturing Company Tape for encasing electronic parts
DE3928712A1 (en) * 1988-08-31 1990-03-01 Norddeutsche Seekabelwerke Ag Holder for electronic micro-components - prevents damage from charges or discharges by having structure made of thermoplastics with conductive layers incorporated
DE3928713A1 (en) * 1988-08-31 1990-03-01 Norddeutsche Seekabelwerke Ag Picking up belt, esp. for surface mounted devices - uses carrying belt closed by web having anti-static conducting strips separated by transparent areas showing components beneath
US5035933A (en) * 1989-03-01 1991-07-30 Rohm And Haas Company Plastic articles with compatibilized barrier resin
US5164441A (en) * 1989-06-02 1992-11-17 Exxon Chemical Patents Inc. Internal resin-tackified acrylic polymers
WO1991014461A1 (en) * 1990-03-28 1991-10-03 Smith & Nephew Plc Adhesive compositions
US5252694A (en) * 1992-01-22 1993-10-12 Minnesota Mining And Manufacturing Company Energy-polymerization adhesive, coating, film and process for making the same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
European Patent Office, Database WPI, Week 8133, Derwent Publications; An 81 59576D & JP A 56079112, Non aq. resin dispersion mfr. . . . , Ricoh KK. *
European Patent Office, Database WPI, Week 8133, Derwent Publications; An 81-59576D & JP-A-56079112, "Non-aq. resin dispersion mfr. . . . ", Ricoh KK.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5942581A (en) * 1995-12-13 1999-08-24 Mitsubishi Rayon Co., Ltd. Lubricant for a thermoplastic resin and a thermoplastic resin composition comprising thereof
US20040045733A1 (en) * 2001-05-10 2004-03-11 Joseph Cheynet Protective casing for a display screen and a method and tool for manufacturing such a casing
DE10357322A1 (en) * 2003-12-05 2005-06-30 Tesa Ag Two-layer pressure-sensitive adhesive

Also Published As

Publication number Publication date
DE4305910A1 (en) 1994-09-01
ES2095689T3 (en) 1997-02-16
DE59401010D1 (en) 1996-12-19
JPH0776675A (en) 1995-03-20
EP0613338B1 (en) 1996-11-13
EP0613338A1 (en) 1994-08-31

Similar Documents

Publication Publication Date Title
EP0466937B2 (en) Plastic carrier tape and cover tape for electronic component chip
US5419960A (en) Coated films with good low temperature sealing properties an hot tack
US5691052A (en) Polymeric compositions with high self-adhesion and packaging materials and packages made therefrom
EP0501068A1 (en) Cover tape for packaging chip type electronic parts
CA1289447C (en) Antistatic sheet material, package, and method of making
US10731054B2 (en) Compound, adhesive article, and methods of making the same
EP0354709B1 (en) A tape for encasing electronic parts
US4935273A (en) Pressure-activated innerseals and containers using same
CA2161763C (en) Anti-static anchor coating agent and laminating composite film
US20190322905A1 (en) Adhesive article and method of making the same
JPH04339882A (en) Polymer composition for peelable film on surface containing pressure-sensitive adhesive
US5545457A (en) Self-adhesive lidding film for packaging electronic components
JP3832603B2 (en) Adhesive tape
US4659788A (en) Radiation curable adhesive composition for surface protective film
EP0590839A1 (en) Pressure sensitive adhesive
JP3249942B2 (en) Composite film for package
DE3682462D1 (en) POLYMERS COMPOSITION FOR PACKAGING FILMS.
EP3541883B1 (en) Adhesive article and methods of making the same
US4343855A (en) Transfer film
EP0907690B1 (en) Polymeric compositions with high self-adhesion and packaging materials and packages made therefrom
AU596266B2 (en) Organo-phosphorous energy transfer agents
EP0102209A2 (en) A heat-sealable thermoplastic film structure with antistatic properties
KR100406623B1 (en) Pressure-sensitive adhesive and surface-protective material
KR102542727B1 (en) Liquid resin composition for forming adhesive layer of cover tape for packaging electronic parts and cover tape manufactured using the same
JPH02214656A (en) Heat-sealing cover tape for use in electronic part carrier

Legal Events

Date Code Title Description
AS Assignment

Owner name: BEIERSDORF AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HARDER, CHRISTIAN;HOWE, BERND;KUHLMANN, KARL;REEL/FRAME:006963/0820

Effective date: 19940406

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

CC Certificate of correction
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20000813

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362